Ontario California Airport (ONT) delays today: 72% of the 76 flights we have timed operated within 15 minutes of schedule. Departures are running +11 min, across 67 flights tracked so far today. The busiest departure hour on today's board is 06:00 local, with 16 flights scheduled to leave. The most-served destination today is Denver (DEN), with 7 departures on the board. Source: official airport boards, METAR weather, Pro Flight Search tracking. Updated 23 October 2026 at 17:18 UTC.
typical departure delay right now
Departures +11 min, arrivals 6 min early. This airport's board does not publish cancellations.
Live arrivals · Delays & weather · Direct routes · Global delays now
Cancellation risk · Do planes make up time? · Weather delay risk
Board fetched 3h ago · how we report
Scheduled departures per 15 minutes. The tallest banks are where queues form.
Delay at the destination often ripples back into departure holds here.
Destinations on the current board, busiest first. 30 airports are served in this departures window.
The busiest departure hour on today's board is 06:00 local, with 16 flights scheduled to leave.
Every board update is stored, including the revisions. The first delay this board admits understates the median outcome. Posted vs. actual across every hub: the slippage study →
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: Ontario California Airport (ONT) live delay and board tracking, measured from official airport boards.
https://proflightsearch.com/airport-departures/ontario-ONT
Ontario California Airport (ONT) delays today: 72% of the 76 flights we have timed operated within 15 minutes of schedule. Departures are running +11 min, across 67 flights tracked so far today.
No cancellations are showing across the 67 flights currently on the board.
The busiest departure hour on today's board is 06:00 local, with 16 flights scheduled to leave.
The busiest destinations on the current board are Denver (DEN), Phoenix (PHX), Las Vegas (LAS), Seattle (SEA), Dallas-Fort Worth (DFW). In total 30 airports are served in this window.
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